Cadillac 2005 XLR - Manual (Page 76)

The theft-deterrent system will not arm if you lock the
driver’s door with the power door lock switch after
the doors are closed.
If your passenger stays in the vehicle when you leave
with the keyless access transmitter, have the passenger
lock the vehicle after the doors are closed. This way the
alarm will not arm, and your passenger will not set it off.
Testing the Alarm
Do the following to test the system:
1. Make sure the trunk lid is latched.
2. Lower the window on the driver’s door.
3. Manually arm the system.
4. Close the doors and wait 30 seconds.
5. Reach through the open window and manually pull
the release lever on the floor.
6. Turn off the alarm by pressing the unlock button on
the transmitter.
If the alarm is inoperative, check to see if the horn
works. If not, check the horn fuse. See Fuses and Circuit
Breakers on page 6-80. If the horn works, but the
alarm doesn’t go off, see your dealer.
Disarming the System
Always use your keyless access transmitter to unlock a
door either by pressing the unlock button on the
transmitter or by squeezing the door handle sensor
while you have the transmitter with you. Unlocking a
door any other way will set off the alarm. If your alarm
sounds, press the unlock button on the keyless
access transmitter to disarm it.
2-20